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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: a) 70 – 5.(x – 3) = 45 b) 12 + (5 + x) = 20 c) 5(x + 12) + 22 = 92 d) 155 – 10(x + 1) = 55 e) 6(x – 23 ) + 40 = 100 f) 2.(x + 32 ) – 5

Toán Lớp 6: a) 70 – 5.(x – 3) = 45 b) 12 + (5 + x) = 20
c) 5(x + 12) + 22 = 92 d) 155 – 10(x + 1) = 55
e) 6(x – 23 ) + 40 = 100 f) 2.(x + 32 ) – 5 = 61

Comments ( 2 )

  1. a) 70 – 5 × ( x – 3 ) = 45
    5 × ( x – 3 ) = 70 – 45
    5 × ( x – 3 ) = 25
    x – 3 = 25 : 5
    x – 3 = 5
    x = 5 + 3
    x = 8
    b) 12 + ( 5 + x ) = 20
    5 + x = 20 – 12
    5 + x = 8
    x = 8 – 5
    x = 3
    c) 5( x + 12 ) + 22 = 92
    5( x + 12 ) = 92 – 22
    5( x + 12 ) = 70
    x + 12 = 70 : 5
    x + 12 = 14
    x = 14 – 12
    x = 2
    d) 155 – 10( x + 1 ) = 55
    10( x + 1 ) = 155 – 55
    10( x + 1 ) = 100
    x + 1 = 100 : 10
    x + 1 = 10
    x = 10 – 1
    x = 9
    e) 6( x – 23 ) + 40 = 100
    6( x – 23 ) = 100 – 40
    6( x – 23 ) = 60
    x – 23 = 60 : 6
    x – 23 = 10
    x = 10 + 23
    x = 33
    g) 2 × ( x + 32 ) – 5 = 61
    2 × ( x + 32 ) = 61 + 5
    2 × ( x + 32 ) = 66
    x + 32 = 66 : 2
    x + 32 = 33
    x = 33 – 32
    x = 1
    @ Rin

  2. a) 70 – 5.(x – 3) = 45
            5.(x-3)=70-45
            5.(x-3)=25
                x-3=25:5
                x-3=5
                x=5+3
                x=8
         Vậy x= 8
     b) 12 + (5 + x) = 20 
                   5 + x   = 20-12
                   5 + x   = 8
                         x   = 8-5
                         x = 3
           Vậy x = 3
     c) 5(x + 12) + 22 = 92 
          5(x  +12)          = 92 – 22
          5(x  +12)          =70
             x+12             =70:5
             x+12             =14
             x                    = 14 – 12
             x                     =2
            Vậy x = 2
    d) 155 – 10(x + 1) = 55 
                   10(x+1)  = 155 – 55
                    10(x+1)  = 100
                        x+1    = 100:10
                        x+1    = 10
                        x         =10-1
                        x         =9
            Vậy x = 9
     e) 6(x – 23 ) + 40 = 100 
         6(x – 23)           = 100 – 40
         6(x – 23)           = 60
            x – 23             = 60 : 6
            x  – 23            = 10 
           x                      = 10 +23
           x                      = 33
           Vậy x = 33
    f) 2.(x + 32 ) – 5 = 61
        2.(x + 32  )      = 61 +5
        2.(x + 32  )       = 66
            x + 32          =66 : 2
            x + 32          = 33
            x                   = 33 – 32
           x                    = 1
            Vậy x = 1
    Xin CTLHN 
    #No_copy
    Đừng tay nhanh hơn não mà nói mik copy nhă:))
    @Hyna
          

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222-9+11+12:2*14+14 = ? ( )